Question

What is next 4 4 8 20 44 84?​

Answer 1

Step-by-step explanation:

4 4 8 2 0 44 85 is the next 4 4 8 2 0 44 84

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Answer 2

Answer :

4 , 4 , 8 , 20, 44, 84, 144

Step-by-step explanation:

Given

4,4,8,20,44,84

Here,

The first number is 4

4 + (4*0) = 4 + 0 = 4

4 + (4*1) = 4 + 4 = 8

8 + (4*3) = 8 + 12 = 20

20 + (4*6) = 20 + 24 = 44

44 + (4*10) = 44 + 40 = 84

Here, 4 is multiplied by 0, 1, 3, 6, 10...

Here 0-1 = 1

3-1 = 2

6-3 = 3

10-6 = 4

So, the difference of the next number to be multiplied by 4 and the number 10 should be 5

Let us take x as the number to be multiplied by 4

So

x -10 = 5

x = 10+5 = 15

So, next we have to multiply 4 by 15

The next number is,

84 + (4*15 ) = 84 + 60 = 144

So, the series is

4, 4 ,8, 20, 44, 84, 144